I just installed an older Lopi 400PI in my fireplace to help ease the high power bills from my electric heat. I've only ran the stove a couple of days, but I'm not really happy with the amount of heat I'm getting. My house is ~1300 sqft, new windows and insulated walls (it's a bit drafty, but better than the majority of older homes). The first night I had the stove set about 1/2 way up (no numbers for pellet feed), burned from 5:00pm until 7:00am and used 40lbs of "premium" pellets and still used the electric heat in the bedrooms. I would have expected to cook myself out of the living room and dining room that are right in the path of the stove, but didn't happen. I had a similar experience last night, ran the stove on the lowest setting all night and burned a little over 1/2 bag in 14 hours- still only half heated the living/dining room and not the bedrooms. It's been chilly here (for us anyway) lows at or near freezing last couple of nights. I'm thinking when our usual winter lows return of the mid 40's it will probably be a different story. So, how do I know if I'm getting the amount of heat from my stove that I should be? I'm gonna try some different pellets tonight, only buying a couple of bags until I know which brand my stove likes the best. Any suggestions?